MPI_Type_hindexed - Online Linux Manual PageSection : 3
Updated : Jan 21, 2016
Source : 1.10.2
Note : Open MPI

NAMEMPI_Type_hindexed − Creates an indexed datatype with offsets in bytes -- use of this routine is deprecated.

SYNTAX

C Syntax#include <mpi.h> int MPI_Type_hindexed(int count, int *array_of_blocklengths, MPI_Aint *array_of_displacements, MPI_Datatype oldtype, MPI_Datatype *newtype)

Fortran SyntaxINCLUDE 'mpif.h' MPI_TYPE_HINDEXED(COUNT, ARRAY_OF_BLOCKLENGTHS, ARRAY_OF_DISPLACEMENTS, OLDTYPE, NEWTYPE, IERROR) INTEGER COUNT, ARRAY_OF_BLOCKLENGTHS(*) INTEGER ARRAY_OF_DISPLACEMENTS(*), OLDTYPE, NEWTYPE INTEGER IERROR

INPUT PARAMETERScount  Number of blocks -- also number of entries in array_of_displacements and array_of_blocklengths (integer). array_of_blocklengths  Number of elements in each block (array of nonnegative integers). array_of_displacements  Byte displacement of each block (C: array of MPI_Aint, Fortran: array of integer). oldtype  Old datatype (handle).

OUTPUT PARAMETERSnewtype  New datatype (handle). IERROR  Fortran only: Error status (integer).

DESCRIPTIONNote that use of this routine is deprecated as of MPI-2. Use MPI_Type_create_hindexed instead. This deprecated routine is not available in C++. The function is identical to MPI_Type_indexed, except that block displacements in array_of_displacements are specified in bytes, rather than in multiples of the oldtype extent. Assume that oldtype has type map {(type(0), disp(0)), ..., (type(n-1), disp(n-1))},with extent ex. Let B be the array_of_blocklength argument and D be the array_of_displacements argument. The newly created datatype has n x S^count-1 (i=0) B[i] entries: {(type(0), disp(0) + D[0]),...,(type(n-1), disp(n-1) + D[0]),..., (type(0), disp(0) + (D[0] + B[0]-1)* ex),..., type(n-1), disp(n-1) + (D[0]+ B[0]-1)* ex),..., (type(0), disp(0) + D[count-1]),...,(type(n-1), disp(n-1) + D[count-1]),..., (type(0), disp(0) + D[count-1] + (B[count-1] -1)* ex),..., (type(n-1), disp(n-1) + D[count-1] + (B[count-1] -1)* ex)}

ERRORSAlmost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI::Exception object. Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

SEE ALSOMPI_Type_create_hindexed
MPI_Type_indexed
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